Multiple choice

Which is not a natural source of air pollution?

  1. Methane emitted by the digestion of food by animals.

  2. During summer season, some forests catch fire causing large amount of smoke in the atmosphere.

  3. Volcanic activities release large amount of harmful gases.

  4. The smoke released from vehicles.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Yes, it is the correct answer. The smoke released from vehicles makes the air polluted. It is a man made source of air pollution.

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